貌似timeseries也可以解决,例如：
proc sort data=sashelp.stocks out=stocks;
by date;run;
ods graphics on;
proc timeseries data=stocks out=nstock plot=(series);
   id date interval=day accumulate=median;
   var open high low close;
run;
ods graphics off;

See the example below . It plots 4 graphs together.

data test;
    do x=-4 to 4 by 0.1;
        pdf1=pdf('normal',x);
                pdf2=pdf('normal',x, 0.2, 1.2);
        cdf1=cdf('normal',x);
                cdf2=cdf('normal',x, 0.2, 1.2);
        output;
    end;
run;

symbol1 c=red v=none i=spline ;
symbol2 c=year v=none i=spline;
symbol2 c=green v=none i=spline;
symbol2 c=blue v=none i=spline;

title "normal pdf and cdf";
proc sgplot data=test ;

    series x=x y=pdf1;
        series x=x y=pdf2;
        series x=x y=cdf1/y2axis;
        series x=x y=cdf2/y2axis;
run;
quit;

如何梗概series（即x）的横坐标刻度？

data test;
     do x=-4 to 4 by 0.1;
         pdf1=pdf('normal',x);
                 pdf2=pdf('normal',x, 0.2, 1.2);
         cdf1=cdf('normal',x);
                 cdf2=cdf('normal',x, 0.2, 1.2);
         output;
     end;
run;

symbol1 c=red v=none i=spline ;
symbol2 c=year v=none i=spline;
symbol2 c=green v=none i=spline;
symbol2 c=blue v=none i=spline;

title "normal pdf and cdf";
proc sgplot data=test ;

    series x=x y=pdf1;
         series x=x y=pdf2;
         series x=x y=cdf1/y2axis;
         series x=x y=cdf2/y2axis;
yaxis  values=(0 to 0.5 by 0.05) grid;
   xaxis  values=(-4 to 4 by 0.5) grid;


run;
quit;

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